Opecoelidae is a family of trematodes. It is the largest digenean family with over 90 genera and nearly 900 species, almost solely found in marine and freshwater teleost fishes.Bray, Rodney A., Cribb, Thomas H., Littlewood, D. Timothy J. & Waeschenbach, Andrea (2016). The molecular phylogeny of the digenean family Opecoelidae Ozaki, 1925 and the value of morphological characters, with the erection of a new subfamily. Folia Parasitologica, 63, 1–13. It was considered by Bray et al. to belong in the superfamily Opecoeloidea Ozaki, 1925 or the Brachycladioidea Odhner, 1905.

Genera Family Opecoelidae

Subfamily Bathycreadiinae Martin, Huston, Cutmore & Cribb, 2018Martin, S. B., Huston, D. C., Cutmore, S. C. & Cribb, T. H. (2018). A new classification for deep-sea opecoelid trematodes based on the phylogenetic position of some unusual taxa from shallow-water, herbivorous fishes off south-west Australia. Zoological Journal of the Linnean Society, 186(2), 385–413. Genus Bathycreadium Kabata, 1961Kabata, Z. (1961). A new genus and species of trematode parasitic in Macrurus fabricii (Sundeval), a deep-sea fish. Proceedings of the Zoological Society of London, 136, 285–292. Subfamily Hamacreadiinae Martin, Downie & Cribb, 2019Martin, S. B., Downie, A. J. & Cribb, T. H. (2019). A new subfamily for a clade of opecoelids (Trematoda: Digenea) exploiting marine fishes as second-intermediate hosts, with the first report of opecoelid metacercariae from an elasmobranch. Zoological Journal of Linnean Society, 188(2), 455–472. Genus Allopodocotyle Pritchard, 1966Pritchard, M. H. (1966). A revision of the genus Podocotyle (Trematoda: Opecoelidae). Zoologische Jahrbucher, Abteilung für Systematik, 93, 158–172. Genus Bentholebouria Andres, Pulis & Overstreet, 2014Andres, M. J., Pulis, E. E. & Overstreet, R. M. (2014). New genus of opecoelid trematode from Pristipomoides aquilonaris (Perciformes: Lutjanidae) and its phylogenetic affinity within the family Opecoelidae. Folia Parasitologica, 61(3), 223–230. Genus Cainocreadium Nicoll, 1909 Genus Choanotrema Nitta & Tanaka, 2018Nitta, M. & Tanaka, M. (2018). Choanotrema nom. nov. (Trematoda: Opecoelidae), a new replacement name for Choanostoma Yamaguti, 1934, a junior homonym of Choanostoma Wang, 1930 (Ciliophora: Haptorida: Didiniidae). Systematic Parasitology, 95, 969–970. Genus Hamacreadium Linton, 1910 Genus Pacificreadium Durio & Manter, 1968Durio, W. O. & Manter, H. W. (1968). Some digenetic trematodes of marine fishes of New Caledonia. Part II. Opecoelidae and Lepocreadiidae. The Journal of Parasitology, 54(4), 747. Genus Paraplagioporus Yamaguti, 1939Yamaguti, S. (1939). Studies on the helminth fauna of Japan. Part 26. Trematodes of fishes, VI. Japanese Journal of Zoology, 8, 211–230. Genus Pedunculacetabulum Yamaguti, 1934 Genus Podocotyloides Yamaguti, 1934 Subfamily Helicometrinae Bray, Cribb, Littlewood & Waeschenbach, 2016 Genus Helicometra Odhner, 1902Odhner, T. (1902). Mitteilungen zur Kenntnis der Distomem II. 3. Helicometra n. g. Allocreadiinarum. Centralblatt für Bakteriologie, Parasitenkunde, und Infektionskrankheiten, 31, 160–162. Genus Helicometrina Linton, 1910Linton, E. (1910). Helminth fauna of the Dry Tortugas. II. Trematodes. Carnegie Institution of Washington Publications, 133, 11–98. Genus Neohelicometra Siddiqi & Cable, 1960Siddiqi, A. H. & Cable, R. M. (1960). Digenetic trematodes of marine fishes of Puerto Rico. Scientific Survey of Porto Rico and the Virgin Islands, 17(3), 257–368. Genus Proneohelicometra Hassanine, 2006Hassanine, R. M. E. (2006). Trematodes from Red Sea fishes: Proneohelicometra aegyptensis gen. nov., sp. nov. (Opecoelidae Ozaki, 1925) and Neohypocreadium gibsoni sp. nov. (Lepocreadiidae Odhner, 1905). Acta Parasitologica, 51(4), 249–254. Subfamily Opecoelinae Ozaki, 1925 Genus Anisoporus Ozaki, 1928Ozaki, Y. (1928). On some trematodes with anus. Japanese Journal of Zoology, 2, 5–33. Genus Anomalotrema Zhukov, 1957Zhukov, E. V. (1957). New genera and species of trematodes parasites of fish in the far-eastern seas. Zoologicheskii Zhurnal, 36, 840–846. Genus Apertile Overstreet, 1969Overstreet, R. M. (1969). Digenetic trematodes of marine teleost fishes from Biscayne Bay, Florida. Tulane Studies in Zoology and Botany, 15, 119–176. Genus Coitocaecum Nicoll, 1915Nicoll, W. (1915). The trematode parasites of north Queensland. III. Parasites of fishes. Parasitology, 8, 24–41. Genus Dactylomyza Aken'Ova, 2003Aken'Ova, T. O. (2003). Dactylomyza gibsoni n. g., n. sp. (Digenea: Opecoelidae) from Schuettea woodwardi (Waite) (Monodactylidae) from off Western Australia. Systematic Parasitology, 55(1), 61–65 Genus Dactylostomum Woolcock, 1935Woolcock, V. (1935). Digenetic trematodes from some Australian fishes. Parasitology, 27(3), 309–331. Genus Dimerosaccus Shimazu, 1980Shimazu, T. (1980). Dimerosaccus gen. nov. (Digenea: Opecoelidae), with a redescription of its type species, Dimerosaccus oncorhynchi (Eguchi, 1931) comb. nov. Japanese Journal of Parasitology, 29(3), 163–168. Genus Discoverytrema Gibson, 1976Gibson, D. I. (1976). Monogenea and Digenea from fishes. Discovery Reports, 36, 179–266. Genus Genitocotyle Park, 1937Park, J. T. (1937). A new trematode, Genitocotyle acirrus gen. nov., sp. nov. (Allocreadiidae), from Holconotus rhodoterus. Transactions of the American Microscopical Society, 56(1), 67–71. Genus Labracetabulum Reimer, 1987Reimer, L. W. (1987). Opecoelidae (Trematoda) von Meeresfischen vor Moçambique. Angewandte Parasitologie, 28, 143–158. Genus Manteriella Yamaguti, 1958Yamaguti, S. (1958). Systema helminthum. Vol. 1. The digenetic trematodes of vertebrates. Interscience Publications, New York. Genus Margolisia Bray, 1987Bray, R. A. (1987). Some helminth parasites of marine fishes of south Africa: family Opecoelidae (Digenea). Journal of Natural History, 21(4), 1049–1075. Genus Neodactylostomum Toman, 1996Toman, G. (1996). Paradactylostomum Toman 1992 preoccupied. Acta Parasitologica, 41(2), 103. Genus Notoporus Yamaguti, 1938Yamaguti, S. (1938). Studies on the Helminth Fauna of Japan. Part 21. Trematodes of Fishes, IV. Kyōto: Yamaguti, S. Genus Opecoeloides Odhner, 1928Odhner, T. (1928). Weitere Trematoden mit Anus. Arkiv för Zoologi, 20, 1–6. Genus Opecoelus Ozaki, 1925 Genus Opegaster Ozaki, 1928 Genus Paropecoelus Pritchard, 1966Pritchard, M. H. (1966). Studies on digenetic trematodes of Hawaiian fishes: family Opecoelidae Ozaki. Zoologische Jahrbucher, Abteilung für Systematik, 93, 173–202. Genus Parvacreadium Manter, 1940Manter, H. W. (1940). Digenetic trematodes of fishes from the Galapagos Islands and the neighboring Pacific. Allan Hancock Pacific Expeditions, 2, 364–473. Genus Poracanthium Dollfus, 1948Dollfus, R. P. (1948). L'enigme de Distoma furcatum Bremser enfin expliquée. Contribution à la connaissance des trématodes des poissons du genre Mullus en Méditerranée. Bulletin de l'Institut Océanographique, Monaco, 45(928), 1–23. Genus Pseudopecoeloides Yamaguti, 1940Yamaguti, S. (1940). Studies on the helminth fauna of Japan, Part 31. Trematodes of fishes, VII. Japanese Journal of Zoology, 9, 35–108. Genus Pseudopecoelus von Wicklen, 1946von Wicklen, J. H. (1946). The trematode genus Opecoeloides and related genera, with a description of Opecoeloides polynemi n. sp. The Journal of Parasitology, 32(2), 156–163. Subfamily Opecoelininae Gibson & Bray, 1984Gibson, D. I. & Bray, R. A. (1984). On Anomalotrema Zhukov, 1957, Pellamyzon Montgomery, 1957, and Opecoelina Manter, 1934 (Digenea, Opecoelidae), with a description of Anomalotrema koiae n. sp. from North Atlantic waters. Journal of Natural History, 18, 949–964. Genus Bartoliella Aken'Ova, 2003 Genus Opecoelina Manter, 1934Manter, H. W. (1934). Some digenetic trematodes from deep-water fish of Tortugas, Florida. Papers from Tortugas Laboratory, 28, 257–345. Subfamily Opistholebetinae Fukui, 1929Fukui, T. (1929). Studies on Japanese amphistomatous parasites, with revision of the group. Japanese Journal of Zoology, 2, 219–351. Genus Gaevskajatrema Gibson & Bray, 1982Gibson, D. I. & Bray, R. A. (1982). A study and reorganization of Plagioporus Stafford, 1904 (Digenea: Opecoelidae) and related genera, with special reference to forms from European Atlantic waters. Journal of Natural History, 16(4), 529–559. Genus Heterolebes Ozaki, 1935Ozaki, Y. (1935). Two new trematodes of the family Opistholebetidae Travassos. Proceedings of the Imperial Academy of Tokyo, Series A, Zoology, 11, 244–246. Genus Maculifer Nicoll, 1915 Genus Macvicaria Gibson & Bray, 1982 Genus Magnaosimum Martin, Crouch, Cutmore & Cribb, 2018Martin, S., Crouch, K., Cutmore, S. & Cribb, T. (2018). Expansion of the concept of the Opistholebetinae Fukui, 1929 (Digenea: Opecoelidae Ozaki, 1925), with Magnaosimum brooksae n. g., n. sp. from Tripodichthys angustifrons (Hollard) (Tetraodontiformes: Triacanthidae) in Moreton Bay, Australia. Systematic Parasitology, 95(2), 121–132. Genus Opistholebes Nicoll, 1915 Genus Pachycreadium Manter, 1954Manter, H. W. (1954). Some digenetic trematodes from fishes of New Zealand. Transactions of the Royal Society of New Zealand, 82, 475–568. Genus Parallelolebes Martin, Ribu, Cutmore & Cribb, 2018Martin, S., Ribu, D., Cutmore, S. C. & Cribb, T. H. (2018). Opistholobetines (Digenea: Opecoelidae) in Australian tetraodontiform fishes. Systematic Parasitology, 95, 743–781. Genus Peracreadium Nicoll, 1909Nicoll, W. (1909). Studies on the structure and classification of the digenetic trematodes. Quarterly Journal of Microscopical Science, New Series, 53(3), 391–487. Genus Pinguitrema Siddiqi & Cable, 1960 Genus Propycnadenoides Fischthal & Kuntz, 1964Fischthal, J. H. & Kuntz, R. E. (1964). Digenetic trematodes of fishes from Palawan Island, Philippines. Part I. Families Acanthocolpidae, Angiodictyidae, Cryptogonimidae, Fellodistomidae, and Gyliauchenidae. The Journal of Parasitology, 50(2), 248–252. Genus Pseudoheterolebes Yamaguti, 1959Yamaguti, S. (1959). Studies on the helminth fauna of Japan. Part 54. Trematodes of fishes, XII. Publications of the Seto Marine Biological Laboratory, 7(2), 241–262. Genus Pseudopycnadena Saad-Fares & Maillard, 1986Saad-Fares, A. & Maillard, C. (1986). Trématodes des poissons des côtes du Liban. I. Pseudopycnadena fischthali n. g. n. sp. (Trematoda Opistholebetidae) parasite des Diplodus (Teleostei) des côtes du Liban. Annales de Parasitologie Humaine et Comparée, 61(3), 303–309. Genus Pycnadena Linton, 1910 Genus Pycnadenoides Yamaguti, 1938 Subfamily Plagioporinae Manter, 1947Manter, H. W. (1947). The digenetic trematodes of marine fishes of Tortugas. American Midland Naturalist, 38(2), 257–416. Genus Anthochoanocotyle Kamegai, 1972Kamegai, S. (1972). Anthochoanocotyle kihobo n. g., n. sp. (Trematoda: Opecoelidae, Plagioporinae) from deep sea fish. Japanese Journal of Parasitology 21, 333–335. Genus Choerodonicola Cribb, 2005Cribb, T. H. (2005). Family Opecoelidae Ozaki, 1925. In Bray, R., Gibson, D. & Jones, A. (Eds.), Keys to the Trematoda. Vol. 2 (pp. 443–531). London, UK: CABI Publishing and The Natural History Museum. Genus Decemtestis Yamaguti, 1934Yamaguti, S. (1934). Studies on the helminth fauna of Japan. Part 2. Trematodes of fishes. I. Japanese Journal of Zoology, 5, 249–541. Genus Diplobulbus Yamaguti, 1934 Genus Eucreadium Dayal, 1942Dayal, J. (1942). On a new trematode Eucreadium eutropiichthyius n. gen., n. sp. from the intestine of a fresh-water fish Eutropiichthys vacha. Proceedings of the Indian Science Congress, 28(3), 171. Genus Heterochoanostoma Machida, 2014Machida, M. (2014). Seven species of opecoelid digeneans (Trematoda) from fishes of southern Japan, Palau, and the Philippines. Bulletin of the National Museum of Natural Sciences, Series A, 40(1), 1–3. Genus Hysterogonia Hanson, 1955Hanson, M. L. (1955). Some digenetic trematodes of plectognath fishes of Hawaii. Proceedings of the Helminthological Society of Washington, 22(2), 75–87.